Hi everyone,
I’m running a Victron three-phase ESS setup with the following components:
3 x Multiplus II 48/10000
3 x MPPT 250/100
Cerbo GX
6 x Pytes V5 batteries
VE.Bus connected to Cerbo GX
The issue happens only when VE.Bus is connected to the Cerbo GX:
Solar production drops to zero, even though there’s sun and PV available.
The inverter works normally (not in passthrough), but instead of using solar, it pulls energy from the batteries.
If I manually activate the “Charge 100%” command in the Multiplus menu, MPPTs wake up and start producing, the system balances properly, and there’s no import from the grid – everything works fine.
However, once the batteries reach 100% SOC:
All MPPTs shut down completely
The system continues to power loads, but it draws from the batteries instead of using available solar
It seems like the Cerbo or ESS logic is stopping solar production at full SOC, without feeding excess into the grid or directly to loads.
Questions:
Has anyone encountered this behavior before?
Could it be a wrong setting in ESS, DVCC, or Battery Monitor config?
Might this be a firmware-related issue?
All firmware is fully up to date (Multiplus, MPPTs, and Cerbo GX).
Thanks in advance! Any suggestions would be greatly appreciated.